Contact-plug for sockets for electric lights.



. m r'sfiqmb, JULY 16, 1907. F. w. JAEGER & e. LANDSEE. CONTACT PLUG FORsooxms FOR ELEGTRIG LIGHTS.

LPPIIOATIOH FILED MAY 4, 1905.

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No. 860,482. Specification of- To all whom it may concern:

Be it known that we, FREDERICK W. JAEGER and GUSTAV A. LANDSEE, citizensof the United States,

residing at Milwaukee, in the county of Milwaukee and- State ofWisconsih, have invented certain new and useful Improvements inContact-Plugs for Sockets for Electric Lights, of which the following isa specification.

Our invention relates to improvements in what may be termedcontact-plugs for sockets for electric lights.

Its object is primarily to effect the insertion of the plug without thescrewing action and accordingly make the contact immediately and withfacility, and

yet provide for this form of connection between the contact-plug andsocket; and to accomplish these ends in a simple, economic and effectivemanner.

Said invention consists of certain features substantially as hereinafterfully disclosed and pointed out 5', by the claims. r 5 In theaccompanying drawing illustrating the preferred embodiment of ourinvention -Figure 1 is a vertical sectional view thereof. Fig. 2 is alike section of the same viewed at right-angles to the plane of thesection of Fig. 1, with the plunger for spreading the screw-thread endedspring arms of the attaching or clasp-member partly broken away and inretracted or withdrawn position. Fig. 3 is a cross-section thereof onthe lirfe 33 of Fig. 1. Fig. 4 is a like section on the line 4-4 ofFig. 1. Fig. 5 is also-a like section on the Iine 5-5 of Fig. 1, viewingupward, Fig. 6 is a disassembled view of the bisected screw-threadedclaspmember. Fig. 7 is a like view of the slidable wdgemember, orplunger, partly broken away.

In the disclosure of our invention, we employ a contact-plug 2 ofpeculiar construction, the same comprising a practically split plugproper 3 formed of two members 4, 5 of arcuate external outline andhaving their lower end-portions normally in contact and their upper endsfixed to the inner ends of a yoke-like shaped spring 6 in a single orcontinuous piece. Said plugmembers have outer screw-threaded surfaces 7which are effective to mesh or engage with the internally screw-threadedsurface of the ordinary wall socket (not shown) for efiecting connectiontherebetween. The arms of the spring or yoke 6 are each carried inwardtoward each other and downward in a straight line a short distance thepurpose of which will presently appear. Said yoke or spring 6 has itsupper end-portion suitably secured to the lower end of a suitable handle.1 i 8 of non-conducting material,. as wood. Also to said handle,laterally, is secured a fibrous or non-conduct ing cylinder or casing 9reaching down around and guarding or inclosing in the main the aforesaidparts. Also depending from said handle, but in a plane at right-anglesto said yoke or spring, is a frame-like membar or bracket 10 having itsupper laterally extended I FREDERICK W. JAlEGER AND GUSTAV A.

; Application filed May 4,1906. Serial no. 15,217.

PATENT ,OFFICE.

LANDSEE, OF MILWAUKEE, WISCONSIN.

CONTACT-PLUG FOR SOCKETS FOR ELECTRIC LIGHTS.

Letters Patent. Patented July 16, 196'?- I terminals suitably secured tothe lower end of said handle. What may be termed a plunger or contact 11having upper and lower headed ends passes freely or loosely through acentral hole in the lower cross-bar of the frame or bracket 10 and hasinserted thereon a helical or coiled spring 13 upon which is slipped arubber or insulating tube 12 and which provides for holding said plungeror contact in position under spring-pressure and'for its automaticseating and to provide for bringing the threads of the plug-member andthe socket receiving the same into automatic regisor inserted thereonrubber tubesor insulation 14; and extending loosely and centrallythrough the handle 8 is a rod or stem 15, having fixed to its upper end,above said handle a handle 16 of its own, and which-rod or stem hasfixed to its inner end a wedge or device 17, effective to engage, assaid rod through its handle is suitably actuated, the inwardly extendedstraight portions bf the spring-arms of the screw-threaded plugmembers4, 5 for spreading the latter apart and effecting connectiontherebetween and the corresponding surface of the socket before noted.This arrangement, it will be noted, thus provides for the insertion ofthe contact-plug into its socket, without resorting to the screwingaction ordinarily required for that purpose and yet retaining such formof connectioh between We claim 1. -A device of the character described,comprising a contact-plug having screw-threaded members provided withspring-arms, means adapted to be manually actuated mam contact-plungercofiperating with said screwthreaded members as set forth.

2. A contact-plug comprising screw-threaded plug-memhers. arcuate incross-section and converging toward each other at their free ends, andterminating the spring-arms of a yoke, a handle-member having said yokeattached thereto, and a manually actuated wedge arranged in a to spreadthe latter.

bers, arcuate in cross-section and converging toward each other at theirfree ends and terminating the spring-arms of 'a yoke, a handle-memberhaving said 'yoke attached thereto, and a second handle-membersuperposed with relation to the aforesaid handle-member and having rod-;connection with said wedge, passing through the afore- I saidhandle-member.

E 4. A contact-plug comprising screw-threaded plug-memthese parts andwhich connection is effected herein for spreadiugnsfliiplugpmembers, andaii autdi natidally' line central of said screw-threaded members andeffective 3. A contact-plug comprising screwthreaded plug-mem-' tration.The frame or bracket 10 has suitably applied hers, arcuate incross-section and converging toward each other at their free ends, aplunger-like contact-member arranged intermediately of said plug-memberswith one end projecting beyond the latter and havingapplied theretoaninsulated spring for facilitating the contacting action of saidplug-members as set forth, a manually actuated wedge arranged in a linecentral of said plug-members and effective for spreading the latter, ahandle carrying said plug-members, and a second handle-member havingrod-connection with said dredge, passing freely through 10"

